EP0485901B1 - Procédé de pressurage et dispositif pour sa mise en oeuvre - Google Patents

Procédé de pressurage et dispositif pour sa mise en oeuvre Download PDF

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EP0485901B1
EP0485901B1 EP91119062A EP91119062A EP0485901B1 EP 0485901 B1 EP0485901 B1 EP 0485901B1 EP 91119062 A EP91119062 A EP 91119062A EP 91119062 A EP91119062 A EP 91119062A EP 0485901 B1 EP0485901 B1 EP 0485901B1
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Prior art keywords
pressure
value
pressing
press
pressure stage
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German (de)
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EP0485901A1 (fr
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Jean Bonnet
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Constructions Meca Metalliques Chalonnaises SA
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Constructions Meca Metalliques Chalonnaises SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
    • B30B9/047—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/22—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using a flexible member, e.g. diaphragm, urged by fluid pressure

Definitions

  • the present invention relates to the field of juice extraction from agricultural products and aims to provide a pressing method for controlling a press and an apparatus for performing this method.
  • these known pressing methods comprise several preset pressure levels. At the end of each pressure stage, the pressure is reduced and the materials are mixed. Nevertheless, pressing processes are also known in which several pressure increases can follow one another without intervening mixing. The various parameters of the pressing cycles of these known methods are determined experimentally by the operator of the press, then programmed and completely reproduced by the automatic of the presses.
  • a pressing method for juice from fruits or vegetables known from SU-A-531'765 can be controlled by gradually increasing the pressure on the product and stabilizing it at each stage. The pressure is increased if there is no difference between the actual squeezed amount of juice and a setpoint.
  • FR-A-2'590'046 station Oenotechnique de Champagne
  • a method for automating the function of a grape press includes a flow meter for the juice outflow from the press tub, the measurement signal of which is fed to an automatic machine.
  • the machine generates a control signal for an electrical control circuit for the pressure inside the tub.
  • the object of the present invention is therefore to provide a pressing method in which the levels of the working pressure of the press are determined automatically, i.e. without user intervention, as well as the duration of these pressure levels, the possible connection of several pressure levels Execution of pressure reduction phases and the degree of mixing during the pressure reduction phases, that is to say, the entirety of the parameters which determine the course of a pressing cycle and this depends on the development of the pressing.
  • this process enables a juice of better quality to be obtained and also a better utilization of the pressed material by a type of process which is gentler on the pressed material.
  • This task is carried out in a pressing process which allows the control and regulation of a press during a juice extraction process and at least a sequence of pressure increases to separate the solid and liquid substances from agricultural products, such as grapes, berries, fruits or vegetables, by means of a pressing device, which can be driven in a container, wherein the juice output or the amount of liquid which is obtained before, during or after the pressing or the material to be pressed which remains partially juiced after the pressing is measured and with an expected value which is before and / or is calculated in the course of the pressing process, compared and the value resulting from the difference in juice output or the amount of liquid obtained or the amount of Pressed material, which may remain partially juiced in the press and gives the value of the expected juice output or quantity, is used to start, continue, interrupt, change or end the juice extraction process, said process being at least partially programmed and wherein the pressing of a batch of pressed material takes place by means of several sequences of pressure increases, which are interspersed with one or more stirring phases of the pressed material and which form a
  • Another object of the invention is to provide a device for carrying out the automatic pressing process with an automatic machine with a fixed memory, which in particular controls a device for supplying the press with pressurized liquid and a motor for rotating the tub of the press, on the other hand with a pressure sensor, which Press pressure measures and with a flow meter, which is arranged below the emptying opening for the liquids obtained.
  • This device is characterized in that the machine is programmable, comprises a read-write memory and can be controlled by a control panel, which in particular allows the limit duration of a press cycle, as well as the value of at least one factor that determines the course of said cycle, to be determined.
  • the pressing method is based on measuring and comparing the flow rate or the amount of liquid obtained before, during or after the pressing or the partially dried pressed material remaining in the press 1 after the pressing with a given value and the value that results the difference between the values for the flow rate or the amount of liquid obtained and the given values for the flow rate or the amount of liquid obtained, or to use the amount of the remaining, if necessary partially dried, pressed material to start the process for juice extraction , interrupt, change or terminate, this method being at least partially programmed.
  • S n denotes a sequence of any pressure increase in a pressing operation. This sequence S n may be preceded by a preceding sequence S n-1 and then possibly followed by a subsequent sequence S n + 1 .
  • P n denotes any pressure level of a sequence S n of any pressure increase.
  • the pressure stages P n-1 and P n + 1 are pressure stages which may be lower or higher than pressure stage P n .
  • P n-2 and P n + 2 optionally designate the pressure stages which are lower than P n-1 or higher than P n + 1 .
  • P1 denotes the first pressure stage of a sequence S n of any pressure rise, and P2, P3, P4, etc., the corresponding subsequent pressure stages. The values of these pressure levels are always in the range between the lowest and the greatest value of the pressing pressure that can be achieved and maintained by the press 1, the gradation and the total number these sections may vary depending on the application.
  • At least one batch 4 of pressed material is pressed by means of a plurality of pressure increase sequences S n , which form a pressing cycle C.
  • the pressing or the pressure increase sequences S n are carried out during at least one specific pressure stage P n .
  • the pressing program is changed for the following pressure increase sequence S n or for the later pressure increase sequences S n .
  • the pressing or the pressure increase sequences S n comprise at least one pressure stage P n .
  • the first pressure stage P 1 of a pressure increase sequence S n is adjustable with respect to its value and / or its duration.
  • the flow or the amount of liquid obtained is measured during a pressure stage P n at a constant pressure.
  • the pressing pressure P is changed during a pressure stage P n on the basis of a flow or a quantity of liquid obtained.
  • the pressing pressure P is controlled as a function of the flow or the amount of liquid obtained during a pressure stage P n .
  • the pressing process is essentially based on continuously measuring at least one variable during each pressure increase sequence S n , which depends directly on the amount of liquid currently obtained and is variable during a pressing cycle C, in order to subsequently increase the pressure compare the size measured at certain times and / or its relative fluctuations with the given values and then continue or interrupt the current sequence S n depending on the result of the previous comparison or the comparisons, possibly repeating the preceding processes until the end of the pressing cycle C and finally to cause the press 1 to be emptied at the end of the press cycle C.
  • the pressing method is based more precisely on the continuous measurement and increase in the flow of the outflowing liquid obtained during each pressure increase sequence S n , the subsequent comparison for each pressure level P n , which is achieved by the pressing pressure P, the value D n of the flow D, which is measured at a time t n , and / or the relative increase R n of the flow D, which results from the transition of the pressing pressure P from a lower pressure stage P.
  • the press 1 can be emptied in an automatic emptying cycle or manually by the user.
  • pressing a batch 4 of pressed material after loading the Press 1 only started when the flow D of the outflowing liquid of the press 1 is below a predetermined value D0, as a result of which free juice can flow off in a first phase.
  • the value D0 depends on the material to be pressed and the size of the press used. For example, D0 for grapes and a press 1 with a capacity of 10,000 liters can preferably be set at 7,000 l / h.
  • the determination of the filling quantity T r is essentially also based on measuring the duration of the pressure fluid supply at the beginning of a press cycle C, which is necessary to achieve the pressure level P n with the lowest value.
  • the membrane 3 or the movable press member of the press 1 is pressed against the batch 4 of the pressed material, the duration of the supply being proportional to the free volume of the tub 2 of the press 1. If the conditions of the liquid supply as well as the capacity of the tub 2 are known, a calculation of the filling quantity T r is possible.
  • the determination of the filling quantity T r is essentially based on the measurement of the weight fluctuation in the same height of the tub 2, which results from the loading of the tub with pressed material. If the volume of the batch 4 is known, it is consequently possible in principle to determine the filling quantity T r for a tub 2 with a known capacity.
  • the method according to the invention is also based at the beginning of a pressure increase sequence S n of a pressing cycle C on increasing the pressing pressure P per stage and without delay in succession to a pressure stage P n for which the value D n of the flow D, measured at the time t n, is higher or equal to a value D 1, which was determined automatically at the beginning of the press cycle C, primarily depending on the measured filling quantity T r (FIG. 2).
  • the pressing pressure P is therefore not kept at the pressure stages P n which result in a flow D with a lower value, but after the result of the comparison between the value D n of the flow D at the time t n for each pressure stage P n and the value D1 immediately increased to pressure levels with higher values.
  • the value D 1 depends, apart from the filling quantity, on the type of material to be pressed and the size of the press 1.
  • the value D 1 for grapes and for a press 1 with a capacity of 10,000 liters, preferably 400 l / h, 1,100 l / h and 1,700 l / h for filling quantities T r equal to 10%, 50% and 100%, respectively linear interpolation enables the determination of all values D 1 depending on T r .
  • the time t n of the measurement of the value D n of the flow D of the outflowing liquids obtained is calculated from the beginning of the pressure stage P n and can take, for example, 30 seconds from the beginning of the pressure levels P n , which are reached by the pressure P, are set.
  • the value of the first pressure stage P 1 of a pressure increase sequence S n is equal to the value of the first pressure stage P n of a previous one Pressure increase sequence S n-1 , for which the value D n of the flow D, measured at the time t n , is higher or equal to the value D 1 ( Figure 2).
  • the various pressure increase sequences S n are consequently changed depending on the development of the increased pressing during the preceding pressure increase sequences S n-1 and adapted to new pressing conditions.
  • the pressing pressure P is kept at the pressure stage P n until the flow D falls below a value D T , which was previously calculated , then the pressure P is increased to a higher pressure level P n + 1 .
  • the selection criterion for a transition of the pressure P to a higher stage is the value R n , with the exception of the first stage with P n held , for which R n cannot be calculated, there being no value D m (n-1) (FIG. 1).
  • the pressing method is also based on allowing the pressing pressure P to pass from a pressure stage P n to a higher pressure stage P n + 1 if the value of the flow D is higher than D 1 as soon as that during the pressure stage P n measured flow D has fallen below a value D T , which was calculated for the pressure stage P n , and this if the relative increase R n of the flow D is greater than or equal to the corresponding predetermined value R.
  • R n is large and, above all, larger than a given value R, this means that the juice flows easily out of the pressed material and an additional increase in pressure is justified.
  • R n is small and, above all, smaller than a given value R, this means that the liquid is blocked in the mass of the pressed material. A new pressure increase is therefore useless and the pressure reduction phase with subsequent mixing of the pressed material is therefore appropriate.
  • the value R is preferably in the range of 5% for grapes, for example.
  • the value D T therefore determines the duration for maintaining pressure P at a pressure level P n , for which D n is higher than D 1 and R n is higher than R if the relative increase R n is measurable.
  • the factor K is determined by the user of the press before the start of a press cycle C, depending on the type of the material to be pressed and the speed of execution of the pressing and the desired drying out of the batch 4.
  • a plurality of pressure increase sequences S n are generally carried out, which are interrupted by phases in which the press 1 is depressurized and the material to be mixed is mixed.
  • these pressure reduction and mixing phases are programmed either when the relative increase R n of the flow for a pressure stage P n is less than the given value R, or when the pressure P is the maximum pressure stage P n that can be reached by the press 1 has reached, and are executed after a delay depending on the change in the flow D during a current pressure stage P n .
  • the method is also based on controlling the pressure reduction of the press as soon as the flow D falls below a fractional value D F of the maximum flow rate D M that is reached during the corresponding pressure increase sequence S n , the fractional value D F of the factor K that was set before the start of the press cycle C.
  • G is the fractional ratio of D F / D M.
  • the mixing process of the pressed material after the pressure reduction of the tub 2 of the press 1 is based on rotating the tub 2 for a number of complete rotations T, the number of rotations T depending on the pressure stage P M , which was reached before the pressure reduction, and on the other hand from the measured filling quantity T r and finally from the value K, which was set before the start of the pressing cycle C.
  • the following tables show examples of the changes in parts T1, T2 and T3 depending on P M , K and T r , respectively, as above for grapes and for a press 1 with a capacity of 10,000 liters:
  • the automatic pressing process also relies on interrupting a pressing cycle C when the maximum value D M of the flow D reached during a pressure increase sequence S n is less than one is critical value D c , which was determined at the beginning of the cycle C and mainly depends on the filling quantity T r and the capacity of the tub 2 of the press 1, or if the duration of the pressing cycle C exceeds a limit value T L , which is before the start of the Press cycle C was set. In the latter case, it is possible to carry out a further press cycle C with the same batch, the increased values of the last pressure increase sequence S n of the interrupted press cycle C being used, for example, to change the control of the factor K.
  • FIG. 4 of the accompanying drawings Another object of the invention is a device for carrying out the automatic pressing method described above, which is shown in FIG. 4 of the accompanying drawings, the device essentially comprising, on the one hand, a programmable apparatus 5, which primarily comprises a device 6 for supplying hydraulic fluid and a motor 7 controls, which sets the tub 2 of the press 1 in rotation, and on the other hand a pressure transmitter 8, which measures the pressing pressure P, and a flow meter 9, which is arranged below the discharge opening 10 for the liquid obtained and finally a control panel 11, which above all the determination of the limited duration T L of a press cycle C and the value of at least one factor K for the cycle C enables.
  • a programmable apparatus 5 which primarily comprises a device 6 for supplying hydraulic fluid and a motor 7 controls, which sets the tub 2 of the press 1 in rotation, and on the other hand a pressure transmitter 8, which measures the pressing pressure P, and a flow meter 9, which is arranged below the discharge opening 10 for the liquid obtained and finally a control panel 11, which
  • the programmable apparatus 5 comprises a read-only memory 12 which contains the control program for the pressing process, as well as the reference tables which enable the values D0, D1, D F , T and D c to be determined depending on the factor K, which was set before the press cycle C, and the values T r , D M (n), D M and P M measured at the beginning or during the press cycle C.
  • the programmable apparatus 5 further comprises a working memory 13, which allows the immediate treatment and storage of the various increased values for the flow D and the pressure P during a pressure increase sequence S n and, if appropriate, until the end of a pressure increase sequence S n Stores values that are necessary to determine the following section or sections in the current pressing cycle C.
  • the latter values can also be written into a magnetic tape storage with autonomous supply, so that the pressing can be resumed after a desired interruption if desired.
  • the device according to the invention can also include a control panel 14 which enables the user to empty the tub 2 of the press 1 and, if appropriate, also to clean it.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Press Drives And Press Lines (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Non-Alcoholic Beverages (AREA)
  • Extraction Or Liquid Replacement (AREA)

Claims (26)

  1. Procédé de pressurage permettant la commande et la régulation d'un pressoir au cours d'une opération d'extraction de jus, qui comprend au moins une séquence de montées en pression en vue de séparer les matières solides et liquides de produits agricoles, tels que des raisins, des baies, des fruits ou des légumes, au moyen d'un organe de pressurage pouvant être entraîné dans un récipient, sachant qu'il s'agit de mesurer et de comparer à une valeur attendue calculée avant et/ou pendant l'opération de pressurage le débit ou la quantité de liquide extrait avant, pendant ou après le pressurage ou les matières à pressurer partiellement asséchées restant dans le pressoir (1), et d'utiliser la valeur résultant de la différence des débits ou des quantités de liquide extrait et de la valeur des débits ou des quantités attendus, ou de la quantité de matières à pressurer restant dans le pressoir (1), le cas échéant partiellement asséchées, pour commencer, poursuivre, interrompre, modifier ou achever le processus d'extraction du jus, sachant que ledit processus est au moins partiellement programmé et que le pressurage d'une charge (4) de matières à pressurer est réalisé au moyen de plusieurs séquences (Sn) de montées en pression qui sont entrecoupées de phases de brassage des matières à pressurer et qui constituent un cycle de pressurage (C), caractérisé en ce que le programme de pressurage pour la séquence suivante de montées en pression (Sn) ou pour les séquences (Sn) ultérieures de montées en pression est modifié.
  2. Procédé selon la revendication 1, caractérisé en ce que le pressurage, respectivement les séquences (Sn) de montées en pression, comportent au moins un palier de pression (Pn).
  3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que le premier palier de pression (P₁) d'une séquence (Sn) de montées en pression est réglable en ce qui concerne sa valeur et/ou sa durée.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la mesure du débit ou de la quantité de liquide extrait au cours d'un palier de pression (Pn) est réalisée à pression de pressurage (P) constante.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la pression de pressurage (P) est modifiée sur la base d'un débit ou d'une quantité de liquide extrait au cours d'un palier de pressurage (Pn).
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la pression de pressurage (P) est commandée en fonction du débit ou de la quantité de liquide extrait au cours d'un palier de pression (Pn).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce qu'il consiste à mesurer, essentiellement en continu, au cours de chaque séquence (Sn) de montées en pression, au moins une grandeur dépendant directement de la quantité de liquide qui est extrait instantanément et qui varie au cours d'un cycle de pressurage (C), à comparer ensuite ladite quantité mesurée à des instants déterminés et/ou sa variation relative à des valeurs attendues, puis à poursuivre ou à interrompre la séquence (Sn) en cours en fonction du résultat de la ou des comparaisons précédentes, à répéter éventuellement les opérations précédentes jusqu'à la fin du cycle de pressurage (C), et, enfin, à procéder, le cas échéant, au vidage du pressoir (1) à la fin dudit cycle de pressurage (C).
  8. Procédé selon la revendication 7, caractérisé en ce qu'il consiste à mesurer en continu et à relever, durant chaque séquence (Sn) de montées en pression, le débit (D) d'écoulement du liquide extrait, à comparer ensuite, pour chaque palier de pression (Pn) atteint par la pression de pressurage (P), la valeur (Dn) du débit (D) mesurée à un instant (tn) et/ou l'augmentation relative (Rn) dudit débit (D) résultant du passage de la pression de pressurage (P) d'un palier de pression inférieur (Pn-1) audit palier de pression (Pn), à des valeurs (D₁, R) prédéterminées correspondantes, puis à faire passer consécutivement, soit immédiatement, soit après un certain délai, la pression de pressurage (P) du palier de pression (Pn) à un palier de pression supérieur (Pn+1), ou à interrompre consécutivement, après un certain délai, la séquence (Sn) en cours et à réaliser une décompression du pressoir (1), suivie d'un brassage des matières à pressurer, et ce, en fonction du résultat de la comparaison opérée précédemment et de la valeur du palier de pression (Pn) atteint, et à répéter, éventuellement, les opérations précédentes jusqu'à la fin du cycle de pressurage (C).
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que, après le remplissage du pressoir (1), le pressurage ne commence que lorsque le débit d'écoulement (D) de liquide dudit pressoir (1) est inférieur à une valeur (D₀) prédéterminée.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce qu'il consiste à déterminer, au début de chaque cycle de pressurage (C) , le taux de remplissage (Tr) de la cuve (2) du pressoir (1).
  11. Procédé selon la revendication 10, caractérisé en ce que la détermination du taux de remplissage (Tr) consiste essentiellement, pour un pressoir (1) muni d'un organe de pressurage mobile ou déformable, à mesurer, au début d'un cycle de pressurage (C), la durée d'injection du fluide sous pression nécessaire pour atteindre le palier de pression (Pn) ayant la plus faible valeur.
  12. Procédé selon la revendication 10, caractérisé en ce que ladite détermination du taux de remplissage (Tr) consiste principalement à mesurer la variation de poids au niveau de la cuve (2) du pressoir (1), qui résulte du chargement de cette dernière par les matières à pressurer.
  13. Procédé selon l'une des revendications 1 à 12, caractérisé en ce qu'il consiste, au début d'une séquence (Sn) de montées en pression d'un cycle de pressurage (C), à augmenter successivement, par paliers et sans délai, la pression (P) jusqu'à un palier de pression (Pn) pour lequel la valeur (Dn) du débit (D) mesurée à l'instant (tn) est supérieure ou égale à une valeur (D₁) déterminée automatiquement au début du cycle de pressurage (C) en fonction, notamment, du taux de remplissage (Tr) mesuré.
  14. Procédé selon l'une des revendications 8 à 13, caractérisé en ce que l'instant (tn) de la mesure de la valeur (Dn) du débit d'écoulement (D) du liquide extrait est compté au début du palier de pression (Pn).
  15. Procédé selon l'une des revendications 1 à 14, caractérisé en ce que la valeur du premier palier de pression (P₁) d'une séquence (Sn) de montées en pression est égale à la valeur du premier palier de pression (Pn) d'une séquence précédente (Sn-1), pour lequel la valeur (Dn) du débit (D) mesurée à l'instant (tn) était supérieure ou égale à la valeur (D₁).
  16. Procédé selon l'une des revendications 8 à 15, caractérisé en ce qu'il consiste à maintenir la pression de pressurage (P) au premier palier de pression (Pn) pour lequel la valeur (Dn) mesurée est supérieure à (D₁), jusqu'à ce que le débit (D) chute en dessous d'une valeur (DT) calculée précédemment, puis à augmenter ladite pression (P) jusqu'au palier de pression supérieur (Pn+1).
  17. Procédé selon l'une des revendications 8 à 16, caractérisé en ce que l'augmentation relative (Rn) du débit d'écoulement (D) des liquides extraits qui résulte du passage de la pression de pressurage (P) d'un palier de pression inférieur (Pn-1) au palier de pression (Pn) est donnée par la formule suivante : R n = D M (n) - D m (n -1 ) D m (n -1 )
    Figure imgb0013
     où (D M(n)) est la valeur maximum du débit (D) relevée au cours du palier de pression (Pn) et (Dm(n-1)) la valeur minimum du débit (D) relevée lors du passage de la pression de pressurage (P) du palier de pression (Pn-1) au palier de pression (Pn), et ce, entre les mesures des valeurs (DM(n-1)), c'est-à-dire de la valeur maximale du débit (D) relevée au cours du palier de pression (Pn-1), et (DM(n)).
  18. Procédé selon l'une des revendications 8 à 15 et 17, caractérisé en ce qu'il consiste, lorsque la valeur du débit (D) est supérieure à (D₁), à faire passer la pression de pressurage (P) d'un palier de pression (Pn) à un palier de pression (Pn+1) dès que le débit (D) mesuré au cours du palier de pression (Pn) a chuté en dessous d'une valeur (DT) calculée pour ledit palier de pression (Pn), et ce, lorsque l'augmentation relative (Rn) du débit (D) est supérieure ou égale à la valeur (R) prédéterminée correspondante.
  19. Procédé selon l'une des revendications 16 et 18, caractérisé en ce que la valeur (DT) est déterminée par la formule suivante: (D T ) = K . (D M (n)),
    Figure imgb0014
     où K est un facteur compris entre 0 et 1 qui a été fixé avant le début du cycle de pressurage (C).
  20. Procédé selon la revendication 19, caractérisé en ce qu'il consiste à commander la décompression du pressoir dès que le débit (D) chute en dessous d'une valeur fractionnaire (DF) du débit maximum (DM) atteint durant la séquence (Sn) de montées en pression considérée, ladite valeur fractionnaire (DF) dépendant du facteur (K) fixé avant le début du cycle de pressurage (C).
  21. Procédé selon l'une des revendications 8 à 20, caractérisé en ce que l'opération de brassage des matières pressées, après décompression de la cuve (2) du pressoir (1), consiste à entraîner ladite cuve (2) en rotation pendant un nombre de tours (T) entier, ledit nombre de tours (T) étant fonction, d'une part, du palier de pression (PM) atteint avant la décompression, d'autre part du taux de remplissage (Tr) mesuré et, enfin de la valeur de K fixée avant le début du cycle de pressurage (C).
  22. Procédé selon l'une des revendications 1 à 21, caractérisé en ce qu'il consiste à interrompre un cycle de pressurage (C) lorsque la valeur maximale (DM) du débit (D) atteint durant une séquence (Sn) de montées en pression est inférieure à une valeur critique (DC) déterminée en début de cycle (C) et dépendant, notamment, du taux de remplissage (Tr) et de la contenance de la cuve (2) du pressoir (1), ou lorsque la durée du cycle de pressurage (C) dépasse la valeur limite (TL) fixée avant le début du cycle de pressurage (C).
  23. Procédé selon l'une des revendications 8 à 22, caractérisé en ce que, pour du raisin, la valeur de (R) est avantageusement de l'ordre de 5 %.
  24. Dispositif pour mettre en oeuvre le procédé de pressurage selon l'une des revendications 1 à 23, comprenant un automate (5) avec une mémoire morte qui commande essentiellement un dispositif (6) pour alimenter le pressoir en liquide sous pression et un moteur (7) pour entraîner la cuve (2) du pressoir (1) en rotation, comprenant, d'autre part, un capteur de pression (8) qui mesure la pression de pressurage (P), ainsi qu'un débitmètre (9) qui est disposé en aval de l'orifice d'évacuation (10) des liquides extraits, caractérisé en ce que l'automate (5) est programmable, qu'il comprend une mémoire vive et qu'il peut être commandé par un pupitre de commande (11) qui permet notamment de fixer la valeur limite (TL) d'un cycle de pressurage (C), de même que la valeur d'au moins un facteur (K) qui conditionne le déroulement dudit cycle (C).
  25. Dispositif selon la revendication 24, selon lequel la mémoire morte (12) de l'automate programmable (5) contient le programme de commande du procédé de pressurage, caractérisé en ce que la mémoire morte (12) comprend en outre les tableaux de correspondance qui permettent de déterminer les valeurs (D₀, D₁, DF, T, DC) en fonction du facteur (K) fixé préalablement au cycle de pressurage (C) et des valeurs (Tr, DM(n), DM et PM) mesurées au début ou au cours dudit cycle de pressurage (C).
  26. Dispositif selon l'une des revendications 24 et 25, caractérisé en ce que l'automate programmable (5) comprend en outre une mémoire vive (13) qui permet, au cours d'une séquence (Sn) de montées en pression, de traiter et de mémoriser momentanément les différentes valeurs de débit (D) et de pression (P) relevées et, le cas échéant, de conserver jusqu'à la fin d'une séquence (Sn) de montées en pression, les valeurs nécessaires à la détermination de la ou des étapes suivantes du cycle de pressurage (C) en cours.
EP91119062A 1990-11-16 1991-11-08 Procédé de pressurage et dispositif pour sa mise en oeuvre Expired - Lifetime EP0485901B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9014488 1990-11-16
FR9014488A FR2669266B1 (fr) 1990-11-16 1990-11-16 Procede de pressurage et dispositif pour sa mise en óoeuvre.

Publications (2)

Publication Number Publication Date
EP0485901A1 EP0485901A1 (fr) 1992-05-20
EP0485901B1 true EP0485901B1 (fr) 1994-08-10

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EP91119062A Expired - Lifetime EP0485901B1 (fr) 1990-11-16 1991-11-08 Procédé de pressurage et dispositif pour sa mise en oeuvre

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US (1) US5207154A (fr)
EP (1) EP0485901B1 (fr)
AT (1) ATE109723T1 (fr)
AU (1) AU650289B2 (fr)
DE (1) DE59102494D1 (fr)
ES (1) ES2057716T3 (fr)
FR (1) FR2669266B1 (fr)
PT (1) PT99524B (fr)
ZA (1) ZA919049B (fr)

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RU2125937C1 (ru) * 1994-02-18 1999-02-10 Бухер-Гиер АГ, Машиненфабрик Способ управления давлением сжатия при разделении твердой и жидкой фазы прессуемого материала с помощью пресса
RU2127193C1 (ru) * 1994-03-30 1999-03-10 Бухер-Гиер АГ Машиненфабрик Способ определения и использования количества наполняемого прессуемого материала при разделении твердой и жидкой фаз с помощью фильтровального пресса
RU2127192C1 (ru) * 1994-03-25 1999-03-10 Бухер-Гиер АГ Машиненфабрик Способ подачи прессуемого материала к фильтровальному прессу

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FR2769473B1 (fr) 1997-10-10 1999-12-03 Vaslin Bucher Procede de gestion de l'egouttage et du pressurage, notamment pour un pressoir a cuve rotative
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EP1559536A1 (fr) * 2004-01-29 2005-08-03 Silvino Alonso Juarros Pressoir à raisins vertical et procédé de pressurage effectué à l'aide d'un tel pressoir
US20090081339A1 (en) * 2007-09-24 2009-03-26 Tropicana Products, Inc. Method for producing juice having pre-selected properties and characteristics
SI23672A (sl) * 2011-03-21 2012-09-28 ŠKRLJ d.o.o. Postopek za dodajanje enološkega sredstva grozdju v stiskalnici med potekom stiskanja
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RU2127192C1 (ru) * 1994-03-25 1999-03-10 Бухер-Гиер АГ Машиненфабрик Способ подачи прессуемого материала к фильтровальному прессу
RU2127193C1 (ru) * 1994-03-30 1999-03-10 Бухер-Гиер АГ Машиненфабрик Способ определения и использования количества наполняемого прессуемого материала при разделении твердой и жидкой фаз с помощью фильтровального пресса

Also Published As

Publication number Publication date
ATE109723T1 (de) 1994-08-15
AU8584091A (en) 1992-05-21
US5207154A (en) 1993-05-04
ZA919049B (en) 1992-08-26
AU650289B2 (en) 1994-06-16
DE59102494D1 (de) 1994-09-15
EP0485901A1 (fr) 1992-05-20
ES2057716T3 (es) 1994-10-16
FR2669266A1 (fr) 1992-05-22
PT99524A (pt) 1993-12-31
PT99524B (pt) 1999-02-26
FR2669266B1 (fr) 1995-12-01

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